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“40% to 50% of the genetic information found in your GI tract does not match anything that’s ever been classified before–not plant, animal, fungus, virus, or bacteria. We have no clue what it is. Biologists call it “biological dark matter.” [Mike Pants](http://www.reddit.com/user/mike_pants)

>One of the reasons involved is that a lot of the bacteria just can’t be grown. Scientist have had more difficulty growing gut microbes and therefore they are studied less in general
Either way, super interesting [MrMayo](http://www.reddit.com/user/mrmayo26)